File:Appletons' cyclopaedia of applied mechanics- a dictionary of mechanical engineering and the mechanical arts (1880) (14757128416).jpg

Identifier: appletonscyclopa02dapp (find matches)
Title: Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts
Year: 1880 (1880s)
Authors: D. Appleton and Company Benjamin, Park, 1849-1922
Subjects: Mechanical engineering -- Dictionaries
Publisher: New York, D. Appleton
Contributing Library: Mugar Memorial Library, Boston University
Digitizing Sponsor: Boston University

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thestorehouses. Dealers who harvest small crops, ranging from 4,000 to 8,000 tons per season, neces-sarily use devices of the simplest kind. Tongs, such as are represented in Figs. 2360 and 2361, are69 130 ICE-HARVESTING APPARATUS. most commonly employed. These are made of well-tempered steel The form shown in Fig. 2361 isfinished with adjustable joints, with three teeth in the plate, which press firmly against the sides ofthe ice Two pairs of tongs can be worked with one horse. lleGiys or ?W/omS, of the shape shown in Fig. 2362, are often used instead of tongs. The blockia pnsilv floated unon the eis, which is then hoisted. Where large amounts of ice are harvested, elevators of special construction are employed. Ofthese there are two classes : the ice-screw and the inclined plane or endless chain The Ice-Screw Elevator, made by the Knickerbocker Ice Company of Philadelphia, consists of alarge helix of wrought-iron wound about a wooden stem. The latter is rotated by spur-gearmg, con-
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nected by belting with the horse-power. The ice, being floated upon the helix, is caused by the rota-tion of the latter to ascend and finally to pass off by a chute. By reversing the motion, the ice canbe lowered from the building as rapidly as it can be elevated, the weight of the ice furnishing thepower. A simple brake is required to prevent the screw from revolving too rapidly, and to stop it ™hTh?End£s Cham Elevator is represented in operation in Fig. 2363. The apparatus, as made by theKnickerbocker Ice Companv of Philadelphia, consists of an endless chain, which runs along a load-ing platform to the doorways of the ice-house or series of ice-houses, as the case may be. At.inter-vals on the wharf side of this platform are hoisting-ways, by means of which the ice is.taken fromthe vessels hold and deposited on the chutes. The latter are elevated so as to give the ice sufficient ICE-HARVESTING APPARATUS. 131 motion to carry it gently to its place on the chain, when it is conveyed

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